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Cleaning vinyl boat seats

theoldwizard1

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Feb 22, 2011
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Location
SE MI
My son bought a 20 year old Four Winns power boat. The vinyl upholstery has many very small gray/black mold/mild spots. Simple Green, Clorox Clean Up and even Mr. Clean Magic Eraser won't touch these spots !

Suggestions ?
 
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Shiftless

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Mar 9, 2014
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East Bay SFO
Did you read this series of reviews?
Our son in law has a boat and I have helped clean it from time to time. He has a regular guy that does routine cleaning. And a diver that does routine below the waterline stuff. Keeping a boat ain’t cheap.

 

Pig_Pen

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Oct 5, 2016
Messages
127
Marine 31 has a vinyl cleaner that’s supposed to work well. I think once boat upholstery becomes mildewed, though, you’re on the clock for eventual replacement because it always seems to come back and whatever you use to clean it removes its UV protection and shortens whatever life it has left.
 

dnschmidt

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Oct 3, 2014
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Phoenix, AZ
I can't swim so a boat doesn't do me any good. However, I would contact a detailing supplier (like Detailed Image) and ask them about this problem as boats are the second biggest market for detailing services after cars.
 

Dig Doug

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Apr 16, 2018
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Magic Eraser

 

Shiftless

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East Bay SFO
Magic Eraser

OP in his first post said he tried magic eraser and it didn’t work. That surprises me but the oldwizard said it didn’t.
 

Dig Doug

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Try scrubbing bubbles

 

Dig Doug

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Soft Scrub and then a conditioner

maybe try
Orange hand cleaner apply w/ damp cloth and wipe off with a Wet cloth
 

Jsf721

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Dec 23, 2012
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Location
LI, NY
OP in his first post said he tried magic eraser and it didn’t work. That surprises me but the oldwizard said it didn’t.
You guys realize the eraser sponge is really just a fine Sanding media ? I would not use it on vinyl.

I bet the vinyl in a 20 year old boat is no longer clear coated and it’s a stain not a spot. Good luck. Maybe try a quat disinfectant like micro ban 24
 

bobg03

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Aug 29, 2020
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conway sc
Crud cutter and a semi-soft brush to work off most of it and then one of the many 303 products to make it look new...PIA project
 
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uscarry45

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Oct 21, 2012
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speed bump

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Butte Montana
I can't remember where I got tip from but scrubbing bubbles cleaner works great. Just make sure to try it in an inconspicuous spot first.
 

Fierljeppen

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Jan 26, 2018
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1,159
Cleaning will only go so far on 20-year old vinyl. When I had a boat, I used this product to freshen up my boat upholstery and it made everything look brand new. A lot of other boat owners on our dock started using the product as well after seeing the results. It goes on very thin and seems to absorb into the vinyl and it's a lot cheaper than replacing the upholstery. The sun is brutal to the vinyl and giving it some UV protection will help get the most life out of the upholstery.

I know a lot of people will think I'm crazy, but I truly enjoyed working on the boat, both at the dock and in the off season. It was an absolutely gratifying experience, however expensive. There's something special about being on the water.

marine_vinyl_seat_paint.jpg
 

Steve_P

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Sep 15, 2010
Messages
5,188
Dunno, but I use diluted bleach and simple green to clean the mold off of my house, I spray it on, and it eats it right up. Obviously you need to be careful with bleach, but it pretty much will kill everything.
 

rockettauto

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May 12, 2023
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745
Mineral oil, drip on, let sit at least ten minutes.
Wipe up with alcohol then wipe with mineral oil when you're done.
 

coldh2o

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May 21, 2013
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Ontario, Canada
I can't swim so a boat doesn't do me any good. However, I would contact a detailing supplier (like Detailed Image) and ask them about this problem as boats are the second biggest market for detailing services after cars.

Seems like you're exactly the kind of guy who needs a boat...

We have a pontoon boat with white vinyl seats, this stuff works great. The longer you leave it on, the better. We get it at Canadian Tire but it appears to come from the States.

http://www.starbrite.com/item/mildew-stain-remover

1685409324705.png
 

mcj115

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Dec 4, 2018
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Location
Hershey PA
Buy a lemon front the grocery store....cut it in half and then start rubbing it on the vinyl...it takes a little work but it should remove thos black mold stains on boat vinyl
 

IndyGarage

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Apr 29, 2010
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Location
Indy
Marine 31 is what you need to clean mildew.

I've used everything above and it's better than all of them. I did my pontoon boat last week - it is a 1996 model and has the original seats.

They were covered in grime and a lot of small mildew spots - the white parts literally had black streaks on them.. I would say the seats now look 95% as good as new. There are a few places where the vinyl is sun damaged, and it can't fix that.

There's a lot of bleach in the stuff, so you need to be careful, and previously I ruined my clothes I was wearing when I used it. Spray it on, wait 5 minutes or so - agitate with a brush - respray if the stuff isn't coming off. On my seats it took 3 applications to clean the seats. Then hose it off really good to wash the bleach away. I used an electric pressure washer for the rinse. I then applied a good coat of 303 to the seats.

I had thought the seats were done and needing replaced. I now think I can get at least a couple years out of them.
 

Chic Marine

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Joined
Dec 11, 2023
Messages
1
My son bought a 20 year old Four Winns power boat. The vinyl upholstery has many very small gray/black mold/mild spots. Simple Green, Clorox Clean Up and even Mr. Clean Magic Eraser won't touch these spots !

Suggestions ?
Hi Buddy! Black, pink, purple or orange spots are attacking the core of the vinyl. That is the reason why chemicals or magic eraser are not working. I clearly recommend the Chic Marine Mold Removing Treatment. 100% working. The only thing you have to do is applying the treatment cream and exposing the boat seats to the direct sun rays. The is the link to the boat seats mold remover
 

rmack898

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Jan 23, 2007
Messages
3,212
Location
Honu Grove NE Florida
I spent over 45 years in the marine industry and owned a boat dealership for 15 years. For every “marine” cleaning product, there is an everyday product the is equal or better.
For mold and mildew stains on vinyl WD40 is your friend.
 
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